Blocks&Items Quest - Collecting EVERYTHING in Minecraft

Hello! Lewie(myself) and my friend Edmond are on a quest to collect every block and item that minecraft has to offer! We are doing a series on it and will not stop until we have found and collected everything.

Here is a list of a few major things that they will have to complete:
1) Find a mushroom biome
2) Kill the ender dragon
3) Kill the wither....twice (one time for a nether star, one time for a beacon)

Watch as Lewie and Edmond adventure across the Minecraft world in an attempt to collect EVERYTHING!!!!
We would very much appreciate it if you would follow this series and help us out with things that we possibly missed or give us some tips on how to do things!
(We build a separate building that we will store all of our collected items and blocks in with item frames)